Make sure we always load our default config values

config/bot.go

@@ -5,3 +5,29 @@ type bot struct {
 	Displayname string `yaml:"displayname"`
 	Avatar      string `yaml:"avatar"`
 }
+
+func (b *bot) setDefaults() error {
+	if b.Username == "" {
+		b.Username = "discordbot"
+	}
+
+	if b.Displayname == "" {
+		b.Displayname = "Discord Bridge Bot"
+	}
+
+	return nil
+}
+
+func (b *bot) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	type rawBot bot
+
+	raw := rawBot{}
+
+	if err := unmarshal(&raw); err != nil {
+		return err
+	}
+
+	*b = bot(raw)
+
+	return b.setDefaults()
+}